DTC B1011: Battery Control Power Supply
DTC detecting condition:
- Voltage failure caused by poor contact of battery power supply control circuit
- Battery voltage of body integrated unit is not within the range of 8.5 - 16.5 V.
Trouble symptom:
Functions of body integrated unit stop.
Wiring diagram:
Immobilizer system Ref. to WIRING SYSTEM>Immobilizer System>WIRING DIAGRAM
- CHECK DTC
.
Read the DTC of body integrated unit using Subaru Select Monitor. Ref. to BODY CONTROL SYSTEM (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC)
Is DTC B1011 displayed? (Current malfunction)
Yes: Go to 2
No: Go to 5
- CHECK DTC
.
- Turn the ignition switch to OFF.
- Disconnect and then connect the body integrated unit connector.
- Wait approx. 2 minutes.
- Turn the ignition switch to ON.
- Read the DTC of body integrated unit using Subaru Select Monitor. Ref. to BODY CONTROL SYSTEM (DIAGNOSTICS)>Read Diagnostic Trouble Code (DTC)
Is DTC B1011 displayed? (Current malfunction)
Yes: Go to 3
No: Go to 5
- CHECK FUSE
.
- Turn the ignition switch to OFF.
- Check the fuse.
Is the check result OK?
Yes: Go to 4
No: Replace the defective fuse.
- CHECK HARNESS
.
- Disconnect the body integrated unit connector.
- Using the tester, measure the voltage between terminals.
Connector & terminal
(i84) No. 6 (+) - Chassis ground (-):
Is the voltage 8.5 - 16.5 V?
Yes: Replace the body integrated unit. Ref. to SECURITY AND LOCKS>Body Integrated Unit
No: Repair the harness between body integrated unit and fuse.
- CHECK CONNECTOR
.
- Turn the ignition switch to OFF.
- Disconnect the body integrated unit connector.
Is there poor contact of connector?
Yes: Repair or replace the poor contact of connector.
No: Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.